Power driven compressor that prevents overheating of control circuit

ABSTRACT

A power driven compressor that can prevent its control circuit from overheating includes: a housing whose interior accommodates a transmission assembly and a compressor assembly and has an air inlet and a coolant outlet; a control circuit accommodating box which is disposed on the housing and has a coolant inlet and an air outlet; a connecting pipe whose one end connects to the air outlet of the control circuit accommodating box and whose other end connects to the air inlet of the housing. When the transmission assembly is driven by electrical power, the coolant enters the control circuit accommodating box via the coolant inlet thereof. It then goes through the air outlet, the connecting pipe, and the housing air inlet into the housing for compression. The compressed coolant goes out via the coolant outlet of the housing.

BACKGROUND OF THE INVENTION

1. Field of Invention

The invention relates to a compressor device and, in particular, to a power driven compressor that can prevent the control circuit from overheating.

2. Related Art

A general car compressor system utilizes the power of engine to run its compressor. However, due to the hiking gas price and the fact that crude oil and other resources will be used up, all carmakers devote themselves to the research and development of power driven vehicles. It is therefore a trend for the car compressor system to be driven by electrical power.

However, the current power driven compressor system (e.g., home electronics such as the refrigerator) cannot be directly used in vehicles. The reasons are as follows:

1. The environmental temperature is higher when the vehicle is running. This can easily result in overheating of the compressor motor, lowering its efficiency. The high temperature of the work environment is also likely to damage the starting circuit of the compressor system.

2. Normal home electronic compressor systems have an accommodating room for holding the coolant at its bottom. As the compressor operates, the coolant is sucked upward to lubricate the interior components thereof. Therefore, the home electronic compressor system has to be put in a steady environment in order for the coolant to be sucked up for lubricating the compressor's interior components.

However, a moving vehicle definitely has vibrations. Therefore, the home electronic compressor system cannot be used on vehicles.

SUMMARY OF THE INVENTION

An objective of the invention is to provide a power driven compressor that can prevent its control circuit from overheating. It has the feature of extremely good heat dissipation for the control circuit of the disclosed compressor.

Another objective of the invention is to provide a power driven compressor that can prevent its control circuit from overheating. It is completely driven by electrical power. It has the effects of cooling and lubricating the compressor interior components while the compressor operates.

To achieve the above objectives, the disclosed power driven compressor that prevents its control circuit from overheating includes: a housing, a control circuit accommodating box, and a connecting pipe.

The interior of the housing has an accommodating space for accommodating a transmission assembly and a compressor assembly. The transmission assembly is driven by electrical power and couples to the compressor assembly for compression. The housing has an air inlet and a coolant outlet.

The control circuit accommodating box is mounted on the housing, and has a coolant inlet and an air outlet.

One end of the connecting pipe connects to the air outlet of the control circuit accommodating box. When the transmission assembly is driven by the electrical power, the coolant enters the control circuit accommodating box via the coolant inlet thereof. It then passes in sequence through the air outlet, the connecting pipe, and the air inlet of the housing into the accommodating space of the housing for compression. The coolant is compressed to a high pressure and then expelled out via the coolant outlet of the housing.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will become more fully understood from the detailed description given herein below illustration only, and thus is not limitative of the present invention, and wherein:

FIG. 1 is a three-dimensional exploded view of the invention;

FIG. 2 is a three-dimensional view of the invention after assembly;

FIG. 3 is a cross-sectional view along the A-A line of FIG. 2;

FIG. 4 is a cross-sectional view along the B-B line of FIG. 2; and

FIG. 5 is a schematic view showing the flow of coolant according to the invention:

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.

Please refer to FIGS. 1 to 3. The disclosed power driven compressor that can prevent its control circuit from overheating mainly includes: a housing 11, a transmission component 21, a compression component 31, a control circuit accommodating box 41, and a connecting piper 51.

The housing 11 consists of a bottom cover 12 and an end cover 13. An accommodating space 14 forms inside the housing 11. The bottom cover 12 is formed with an air inlet 15. The end cover 13 is formed with a coolant outlet 16. A support base 17 is formed at an appropriate position around the bottom cover 12.

The transmission component 21 is accommodated in the bottom cover 12. It includes a transmission axle 22, a rotor connected on the transmission axle 22, and a stator 24 fixed on the outer side of the rotor 23. The coil used in the transmission component 21 is made of the acid- and alkaline-proof enamel-insulated wire. The stator 24 is fixed on the inner wall of the bottom cover 12. The driving end of the transmission axle 22 is provided eccentrically with a bearing 25. The rotor 23 rotates with the driving end of the transmission axle 22 under the rotating magnetic field generated by the power driven stator 24.

The compression component 31 is accommodated inside the end cover 13. In this embodiment, the compression component 31 consists of a static scroll 32 and a orbiting scroll 33. The two scrolls 32, 33 have matching spiral inner walls to form a compressions pace 34 in between. The bottom end of the orbiting scroll 33 connects to the bearing 25 on the driving end of the transmission axle 22. The orbiting scroll 33 is thus driven by the transmission axle 22 to rotate eccentrically around the static scroll 32. By rotating the orbiting scroll 33 around the static scroll 32, the volume of the compression space 34 changes to achieve the effect of compressing the coolant entering the housing 11.

The control circuit accommodating box 41 consists of a base 42 and a top cover 43. The base 42 extends downward a plurality of supports 421 connected to the support base 17 on the bottom cover 12 of the housing 11. When the control circuit accommodating box 41 is mounted on the support base 17 on the bottom cover 12 of the housing 11 using the supports 421 of the base 42, a predetermined air gap 44 formed between the control circuit accommodating box 41 and the housing 11. A separator 45 is inserted between the base 42 and the top cover 43 for dividing the interior of the control circuit accommodating box 41 into a disposition space 46 and a flow space 47. The base 42 is formed with a coolant inlet 422 and an air outlet 423. The coolant inlet 422 and the air outlet 423 are in fluid communications with the flow space 47, respectively. Inside the base 42 and between the coolant inlet 422 and the air outlet 423, there is a guide rib 424 that defines the flow space 47 as a coolant flow passage.

One end of the connecting pipe 51 connects to the air outlet 423 on the base of the control circuit accommodating box 41. Its other end connects to the air inlet 15 of the housing 11. The flow space 47 of the control circuit accommodating box 41 thus connects to the accommodating space 14 of the housing 11 via the connecting pipe 51.

Please refer to FIG. 5. When the disclosed transmission component is driven by electrical power, a low-pressure coolant mixed with appropriate coolant oil first enters the flow space 47 of the Control circuit accommodating box 41 via the coolant inlet 422 of the control circuit accommodating box 41. The coolant in the flow space 47 is then guided by the guide rib 424 to leave via the air outlet 423. Through the connection of the connecting pipe 51 between the air outlet 423 of the control circuit accommodating box 41 and the air inlet 15 of the housing 11, the coolant out of the air outlet 423 of the control circuit accommodating box 41 is guided by the connecting pipe 51 into the accommodating space 14 of the housing 11. The invention first guides the coolant into the control circuit accommodating box 41. Therefore, the control circuit (not shown) in the disposition space 46 of the control circuit accommodating box 41 is effectively cooled. When the flow space 47 of the control circuit accommodating box 41 is filled with the coolant, it can block the heat produced due to the operation of the transmission component 21. This enhances the cooling effect on the control circuit in the disposition space 46 of the control circuit accommodating box 41.

As shown in FIG. 3, the coolant entering the accommodating space 14 of the housing 11 is sucked into the compression space 34 between the orbiting scroll 33 and the static scroll 34 by the eccentric rotation of the orbiting scroll 33. It is compressed to a high pressure and then passes through an air valve 35 composed of a reed. It is then expelled via the coolant outlet 15 on the end cover 13 for external uses. The coolant used in the invention is added with appropriate coolant oil. Therefore, the coolant in the accommodating space 14 of the housing 11 has simultaneous cooling and lubricating effects on the transmission component 21 and the compression component 31.

The invention has the following advantages:

1. The invention first guides the coolant into the control circuit accommodating box 41. Therefore, it can effectively cool the control circuit in the disposition space 46 of the control circuit accommodating box 41. When the flow space 47 of the control circuit accommodating box 41 is filled with the coolant, it further blocks the heat produced due to the operation of the transmission component 21 in the housing 11. This enhances the coolant effect on the control circuit in the disposition space 46 of the control circuit accommodating box 41.

2. A predetermined air gap 44 is formed between the control circuit accommodating box 41 and the housing 11. This greatly reduces the bad effects of the operational heat of the components inside the housing 11 on the control circuit.

3. The guide rib 424 formed in the flow space 47 of the control circuit accommodating box 41 can efficiently guide the flow of coolant. This can reduce coolant turbulences and energy loss.

4. The working coolant of the invention is added with appropriate coolant oil. Therefore, the disclosed compressor system can be used in vehicles and used in non-static environments. When the transmission component 21 is driven by electrical power, the coolant fills the compressor, achieving the simultaneous effects of cooling and lubrication. This largely reduces the damages during the operation of compressor motor.

Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to people skilled in the art. Therefore, it is contemplated that the appended claims will cover all modifications that fall within the true scope of the invention. 

1. A power driven compressor that prevents its control circuit from overheating, comprising: a housing, which has an air inlet and a coolant outlet, and whose interior is formed with an accommodating space for accommodating a transmission component and a compression component, the transmission component being driven by electrical power to make the compression component perform a compression action; a control circuit accommodating box, which is mounted on the housing and has a coolant inlet and an air outlet; and a connecting pipe, whose one end connects to the air outlet of the control circuit accommodating box and whose other end connects to the air inlet on the housing; wherein when the transmission component is driven by electrical power, the coolant first enters the control circuit accommodating box via the coolant inlet thereon, passes in sequence the air outlet, the connecting pipe, and the air inlet of the housing into the accommodating space of the housing for compression, and the coolant compressed to a high pressure is expelled outward via the coolant outlet on the housing.
 2. The power driven compressor of claim 1, wherein the housing consists of a bottom cover and an end cover, the air inlet is formed on the bottom cover, the coolant outlet is formed on the end cover, the transmission component is disposed in the bottom cover, and the compression component is disposed in the end cover.
 3. The power driven compressor of claim 1, wherein the transmission component includes a transmission axle, a rotor connect on the transmission axle, and a stator disposed around the rotor, the transmission component is driven by electrical power to generate a rotating magnetic field, and the rotor connector on the transmission axle simultaneously brings the compression component into operation.
 4. The power driven compressor of claim 3, wherein the compression component consists of a static scroll and a orbiting scroll, the orbiting scroll connects to the transmission axle, and the orbiting scroll is driven to rotate eccentrically with respect to the static scroll, providing a compression effect.
 5. The power driven compressor of claim 1, wherein the control circuit accommodating box has an open end, and a side board correspondingly covers the open end of the control circuit accommodating box to block the connection between the control circuit accommodating box and the external space.
 6. The power driven compressor of claim 1, wherein the control circuit accommodating box consists of a base and a top cover, a separator is inserted between the base and the top cover to separate the interior of the control circuit accommodating box into a disposition space and the flow space, and the coolant inlet and the air outlet are in fluid communications with the flow space, respectively.
 7. The power driven compressor of claim 6, wherein a guide rib is inserted inside the base between the coolant inlet and the air outlet to define the flow space as a coolant flow passage.
 8. The power driven compressor of claim 1, wherein the control circuit accommodating box extends downward a plurality of supports, the control circuit accommodating box is mounted on the housing via the supports, and an air gap is formed between the control circuit accommodating box and the housing. 